Re: 3/8" to 1/2" OIL PICK-UP TUBE...AND BLOCK MOD?
[Re: Labratt]
#1218538
04/19/12 12:16 AM
04/19/12 12:16 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
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Romeo MI
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JMO Randy.... nope... you arent spinning high enough and its too easy to crack out(it gets real thin in the boss area)and if you do crack it out... then its a external pick up.......... again... JMO
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Re: 3/8" to 1/2" OIL PICK-UP TUBE...AND BLOCK MOD?
[Re: Labratt]
#1218539
04/19/12 12:20 AM
04/19/12 12:20 AM
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Joined: Mar 2003
Posts: 2,485 PA
moparacer
top fuel
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top fuel
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PA
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I have spun my 500ci 7400 at times with a 3/8 pickup and never had any issues.
That area looked way to thin for me to try drilling it and tapping it.
67 Barracuda street/bracket car 11.27-119 68 Dart 502 BB 8.70s-152 414 cid SB Dragster 7.65-174
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Re: 3/8" to 1/2" OIL PICK-UP TUBE...AND BLOCK MOD?
[Re: Labratt]
#1218541
04/19/12 12:27 AM
04/19/12 12:27 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
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Romeo MI
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Quote:
Thanks for that info,Mike! I definately don't want to crack the block....and have to spend MORE money on an external set-up! This project is already setting me back a pretty penny!
I hear ya.... stop on by.... I have a few Blues for ya... LOL
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Re: 3/8" to 1/2" OIL PICK-UP TUBE...AND BLOCK MOD?
[Re: Labratt]
#1218545
04/19/12 10:58 AM
04/19/12 10:58 AM
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Joined: Jan 2003
Posts: 17,801 S.E. Michigan
ZIPPY
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I Live Here
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If by "block mod" you mean smoothing out the hard 90 degree turn the oil makes right after entering the block, I would say definitely do that. It is a 10 minute deal and costs nothing if you already have the tools. I don't think increasing the oil pickup to 1/2 is necessary, but it does not do any harm unless the procedure is messed up. At that point it does a whole bunch of harm I would never do it to one that looked thin to begin with. So if there are any second thoughts, don't do it
Rich H.
Esse Quam Videri
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Re: 3/8" to 1/2" OIL PICK-UP TUBE...AND BLOCK MOD?
[Re: ZIPPY]
#1218547
04/19/12 11:46 AM
04/19/12 11:46 AM
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Joined: Jan 2003
Posts: 4,003 Shelby Twp. Mi
HardcoreB
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Quote:
If by "block mod" you mean smoothing out the hard 90 degree turn the oil makes right after entering the block, I would say definitely do that. It is a 10 minute deal and costs nothing if you already have the tools.
I don't think increasing the oil pickup to 1/2 is necessary, but it does not do any harm unless the procedure is messed up. At that point it does a whole bunch of harm I would never do it to one that looked thin to begin with. So if there are any second thoughts, don't do it
Yes X2 with Rich...leave it at 3/8" NPT but, using the 1/2" pipe tube. And get in the block with a carbide and radius the intersecting passages. I'd also ream the oil passages to the mains...I think it's a 17/64"
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Re: 3/8" to 1/2" OIL PICK-UP TUBE...AND BLOCK MOD?
[Re: HardcoreB]
#1218548
04/19/12 11:58 AM
04/19/12 11:58 AM
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Joined: Mar 2009
Posts: 1,058 bigfork mn
dragram440
super stock
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super stock
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bigfork mn
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This post makes me feel alot better about my 3/8 pickup. I dont rev it past 6500. It seems to run about the same if I shift at 6800 or 6300 so I figured I might as well keep the r's down and save on the engine a little.
67' charger 499 RB
10.57 at 127
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Re: 3/8" to 1/2" OIL PICK-UP TUBE...AND BLOCK MOD?
[Re: 383man]
#1218550
04/19/12 12:52 PM
04/19/12 12:52 PM
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Joined: May 2005
Posts: 6,446 NJ-USA
HPMike
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Here is another thing that hasn't been mentioned yet, but is very important to note. The 1/2" pickup mod will/may limit your choices when going to a longer stroke. The boss(even with 2.200 rod pin) needs to be clipped to clear the rod big end with stroker setups. Plus now you have a larger diameter tube to contend with. Measure twice/cut once. MB
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Re: 3/8" to 1/2" OIL PICK-UP TUBE...AND BLOCK MOD?
[Re: viperblue72]
#1218553
04/19/12 05:26 PM
04/19/12 05:26 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
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Quote:
I don't really understand why it is necessary to begin with. Fluid can only flow as much as the smallest bottleneck. So rather you have a 20oz pepsi, or a 2qt pepsi bottle, it's gonna flow out the end of the bottle at the same rate. Maybe someone will correct me if I am wrong about my theory.
This is on the suction side... you ALWAYS try to have a larger inlet to your pump... REMEMBER... pumps dont suck... its still atmospheric pressure pushing the oil in.. all the pump does is create the negative pressure zone so the oil can get pushed in.... no difference than the intake and pistons(piston creates the negative so atmospheric pressure can push in the air/fuel
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Re: 3/8" to 1/2" OIL PICK-UP TUBE...AND BLOCK MOD?
[Re: Labratt]
#1218554
04/19/12 07:34 PM
04/19/12 07:34 PM
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Joined: Dec 2004
Posts: 10,550 Rittman Ohio
fourgearsavoy
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Good deal Randy lots of 9 second cars out there with internal 3/8's pickups. I just spent about an hour smoothing the passages in the pump and pick-up passages on my engine Make sure you spend some time with a dremmel or die grinder on your oil pump Gus
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
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Re: 3/8" to 1/2" OIL PICK-UP TUBE...AND BLOCK MOD?
[Re: Labratt]
#1218555
04/19/12 07:42 PM
04/19/12 07:42 PM
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Joined: Jan 2003
Posts: 6,531 Jacksonville, FL
Chris2581
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Jacksonville, FL
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3/8th's on all of our engines..we don't go past 65-6800,so we don't feel the mod is needed.Never have had any bearing or oil related issues.
Nautilus Racing- We use Superformance gaskets and Turbo Action converters/products.
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Re: 3/8" to 1/2" OIL PICK-UP TUBE...AND BLOCK MOD?
[Re: Labratt]
#1218557
04/20/12 01:05 AM
04/20/12 01:05 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Quote:
Thanks guys! Gus..what do you suggest doing with the dremmel? I didn't notice any casting flash on my Melling HV63 pump! Should something on the pump be opened-up? Thanks! Randy
I dont know if your pump has it Randy but where the 2 holes intersect on the bottom (below the rotor) there if usually a bad corner which can be radiused for better flow
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Re: 3/8" to 1/2" OIL PICK-UP TUBE...AND BLOCK MOD?
[Re: Labratt]
#1218559
04/20/12 07:31 AM
04/20/12 07:31 AM
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Joined: Feb 2005
Posts: 4,309 Prospect, PA
BSB67
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Quote:
Thanks guys! Gus..what do you suggest doing with the dremmel? I didn't notice any casting flash on my Melling HV63 pump! Should something on the pump be opened-up? Thanks! Randy
Is it a new pump? The last three Melling pumps that that I bought (they were the HP63) the cover and body of the pump were badly misaligned. Check the pressure side oil passage between the body and cover. On all three I had to enlarge the two small bolt holes in the cover then pinned it in the correct location. IIRC I also opened up that same oil passage in the cover to more closely match the oil passage diameter in the body. This was a few years ago, and in the HP pump, yours could be different.
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Re: 3/8" to 1/2" OIL PICK-UP TUBE...AND BLOCK MOD?
[Re: ZIPPY]
#1218561
04/20/12 11:20 AM
04/20/12 11:20 AM
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Joined: Jan 2003
Posts: 16,917 NC
440Jim
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Quote:
If by "block mod" you mean smoothing out the hard 90 degree turn the oil makes right after entering the block, I would say definitely do that. It is a 10 minute deal and costs nothing if you already have the tools.
I don't think increasing the oil pickup to 1/2 is necessary, but it does not do any harm unless the procedure is messed up. At that point it does a whole bunch of harm I would never do it to one that looked thin to begin with. So if there are any second thoughts, don't do it
1) Smooth the turn/intersection 2) Using a milling machine to do the 1/2 NPT is safer/better than by hand. It allows moving the centerline ~0.050" to keep more meat on the boss. 3) You can use a pickup with the 3/8 NPT thread welded to a larger tube for some of the 1/2 NPT benefit without enlarging the block boss.
FWIW, all my big blocks have the 1/2 NPT mod and the enlarged oil passages to the mains.
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Re: 3/8" to 1/2" OIL PICK-UP TUBE...AND BLOCK MOD?
[Re: Labratt]
#1218562
04/20/12 12:54 PM
04/20/12 12:54 PM
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Joined: Jan 2003
Posts: 17,801 S.E. Michigan
ZIPPY
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I Live Here
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Randy I forgot I posted this a long time ago, but here is an example of some of the work in the area you were asking about, both the pump and the block. It will help the oil flow slightly and costs nothing but some time, as long as you have the tools http://www.moparts.org/Tech/Archive/bb/51.htmlDefinitely have your guy doing the work (or yourself) ream out the passage between the galley and the mains too, to make the passage the same size all the way through it. A good reamer size to use is in Chuck Senatore's book. It's probably worth considering reaming the hole to #4 slightly larger than the rest, because the valvetrain robs that journal of oil......I don't know anyone who does that with every build, but it is something to think about.... Really don't think you "have to" do any of this... truthfully you could leave it alone but these kind of detailed changes are nice improvements to make and cheap insurance. My 400 is tapped to 1/2" NPTF and I did it myself at home, it is not horribly bad to do by hand if a person uses a tapered reamer before tapping the hole. Lacking the tapered reamer, the force required to turn the tap is much higher which creates a greater chance of breaking the iron.
Rich H.
Esse Quam Videri
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